The Grapevine reopened early Monday after a storm closed the 5 Freeway on Sunday. This file photo shows a ramp to the interstate during another storm in January that also forced the roadway to close.

The Grapevine reopened early Monday after a storm closed the 5 Freeway on Sunday. This file photo shows a ramp to the interstate during another storm in January that also forced the roadway to close. (California Department of Transportation)

Frosty temperatures remained even as the storm moved out of the region overnight. Temperatures dropped into the 40s in the L.A. Basin and the 30s in parts of Orange County. The National Weather Service issued a freeze warning into Monday morning for the San Joaquin Valley, cautioning that temperatures could dip into the 20s in some areas.

Below-normal temperatures are expected to continue through the week in Southern California, with another series of storms moving in midweek. Rainy weather will return to the region Wednesday and continue through Thursday, with another bout resuming late Friday night and into Saturday, according to forecasters.

“We are still in a storming pattern where every few days we get some rain,” said Kathy Hoxsi, meteorologist at the National Weather Service in Oxnard. “And because each storm brings in a fresh round of cold air, we are going to be chilly for a while.”

Times staff writers Laura Newberry and Kim Christensen contributed to this report.